Differential gearing.



A. DENMAN-JONES. DIFFERENTIAL GEARING. APPLHIATION man Ammo. m1.

1 ,274,056. Patented July 30, 1913.

2 SHEETS-SHEET I.

A. DENMAN-JONES. DlFFERENTML GEARING. APPLICATION FILED AUG.20. IQII.

Patented July 30, 1918,

2 SHEETS-SHEET 2- AD BIAN DENMAN-JONES, 0F HOLLOWAY, LO NDON, ENGLAND, ASSIGNOB TO THE JANDUS anc LAMP a ELECTRIC COMPANY, LIMITED, OF HOLLQWAY, ENGLAND.

DIFFERENTIAL GEARING.

flpeoifimtion of Letters latent.

Patented J nly 30, 1918.

Application filed August 20, 1917. Serial Ho.1187,221.

To all whom it may concern:

Be it known that I, ADRIAN Demur- JoNrs', a subject of the King of Great Britain, residing at 39 Hartham road, Holloway, in the county of London, England,

vented a new and useful Improvement in Differential Gearing, of which the following is a specification."

This invention relates to improved differential gearing especially applicable to motor cars. I

According to this invention a driving shaft drives a driven shaft through planet pinions carried By a. lanet cage which can be secured to either's aft, but preferably to the driving shaft, b a clutch.

Upon the end 0 the driving shaft is a toothed wheel which ears with a pinion secured to a co-axial pinion, both pmions being mounted upon a shaft carried in bearings ona planet cage free to turn upon the same axis as the driving shaft. The second pinion gears with a toothed /wheel upon the driven shaft. Secured to the cage on the same side as the driving shaft is a brake fitted to the cage and constantly pressed outward by a spring to make contact with the inner flange of a brake drum on thedriving shaft. A contracting brake, as, for instance, a hand brake, secured to the frame of the apparatus is arranged to engage with the Outer periphery of the brake. On the contracting brake being actuated the brake is compressed against the action of the spring freeing the brake from the brake drum on the driving shaft and grcventing the cage from rotating. When t e contracting brake is not in action the driving shaft is irectly coupled with the driven shaft, but when the contracting brake is in action the pinionson the cage come into operation and the speed of the driven shaft 1s altered according to the ratio of the diameter of the pinions.

My invention is illustrated by the accompanying drawings, which show two apparatus made in accordance with this invention.

Figure '1: is a lon itudinal section and Fl 2 is-a section on no line 22, Fig. 1.

iisa driving shaft and B adriven shaft mounted-in hearings on a casing C secured to the frameof a motor car. 0n the end'of the d iving shaft A is toothed wheel I) which cars with two pinions E, E, secured to have inshafts F, F, to which also are secured co-axial 1n bearin in a planet cage H mounted upon the s afts A and B. The pinions G, G, gear with a toothed wheel J upon the driven shaft 13., A brake K isattached to the cage H by a screw in K, and a spring L is attached-to one on other end is ivoted at M and has secured to it a cam L 2 which engages with the ends K of the brake K, constantly ressin the brake K outward into contact with the inner flange of a brakerdrum N on the driving shaft A. Around the brake K'is another brake O actuated by a double screw P can riedon the frame of the car. P is an arm fixed to the screw P by means of which the screw may he turned. When the brake O is not in action the driving shaft is directly coupled with the driven'shaft B as the brake K is in contact with the inner flange of the brake drum N, but when the brake O is in action the brake K is freed from the. brake drum by turning the arm P and the cage H is prevented from rotating, consequently the pinions E, E, and G, G, in the cage H come into operation and the shaft B is driven through them.

What I claim is 1. In difi'erentialgearing,two main shafts, a planetcage mounted on the main shafts, other shafts carried by the planet cage, planet inions mounted on the last-mew tioned shafts, a toothed wheel on each main shaft in gear with the planet pinions, a brake secured to the planet cage, a brake drum on one of the main shafts, a pivotally mounted cam between the ends of the brake, an arm, one end of the arm being secured to the cam, a. spring attached to the other end of the arm, and means for counteracting the pressure of thespring and preventing the brake from engaging with the brake drum.

2. In .difl'erentia'l gearing, two main shafts, a planet cage mounted on the main shafts, other shafts carried ,by the planet cage, planet pinions mounted on the last-men tioned s sits, a toothed wheel on each main shaft in gear with the planet pinions, a brake secured to the planet cage, a brake drum one one of themain shafts, a )ivotally mounted cam between the ends of the brake, an arm, one end of the arm being secured to the cam, a spring attached to the other end plniona G, G. The shafts F, F, are carried of an arm M, whoseof thefx hfy 'fi ddrid' bmkm cuclrclmg the brake secured to the planet, cage, and menus for actuating the second brake.

51, In difiqrenjzial genri ng, two main shu fts,

other shafts carried hy yhc planet cage, planet lnions mounted on the lasbmen- 

